Coking attachment for steam-boiler furnaces.



PATBNTED SEPT. l2, 1905.

T. J. TILLER.

GOKING ATTACHMENT FOR STEAM BUTLER FURNAGBS.

APPLICATION FILED JAN.24. 1905.

2 SHEETS-SHEET l.

WMM/5555s mussw s nimm ce4 num-Lrmocmmna wnmnarc, n cA PATBNTED SEPT. 12, 1905.

T. J. TILLBR.

COKING ATTACHMENT FOR STEAM BOIVLERk PURNACES.

APPLICATION FILED JAN. Z4. 1905.

2 SHEETS-SHEET 2.

....4 AIA EW I@ s www co. womumoamauzns wxsxwcmu, n c.

UNTTED STATES PATENT OFFICE.

THOMAS J. TILLER, OF SEVEN IINES, VIRGINIA, ASSIGNOR OF THREE- FOURTHS TO CHARLES L. DENOON, OF RICHMOND, VIRGINIA.

COKING ATTACHMENT FOR STEAM-BOILER FURNACES.

Speccation of Letters Patent.

Patented Sept. 12, 1905.

Application filed January 24, 1905. Serial No. 242,464.

To n.71 707mm, it 17m/y concern:

Be it known that I, THOMAS J. TiLLnR, of Seven Pines, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Ooking Attachments for Steam-Boiler Furnaces; and I hereby declare that thefollowing is a full,clear, and exact description thereof, reference being' had to the accompanying' drawing's, which form part of this specification.

This invention is an improved fuel-coking, gas-producing, and water-heating attachment for furnaces to be placed in the fire-chamber of such furnaces and by which the fuel may be gasitied and coked before it is dumped into the tire-chamber and burned. The gases generated from the fuel during the coking operation are preferably conveyed directly into the tire-chamber beneath the coking-oven and burned therein, so as to maintain or increase the combustion in the fire-chamber and assist in heating the coking-oven, and when the fuel is fully coked the resultant coke can be dumped from the oven into the fire-chamber and burned on the grate therein in the ordinary manner. The coking-oven is heated by the same fire that is used to generate the steam, so that no heat is wasted. The cokingoven may also be utilized for heating water and producing' steam by making' its walls hollow and connecting same with the waterspace of the boiler, and it is also preferably provided with a novel sectional water bottom or grate, which permits the coke to be dumped from the coking-oven directly onto the grate in the tire-chamber, to be burned therein while fresh coal placed in the coking-oven is coked and gasified, as before.

In this invention, therefore, the fuel, preferably coal, is first coked, then burned, and the combustible gases derived from the fuel during the coking' process are utilized to sustain or support combustion and to assist in the coking' of the fuel itself, and the walls and grate of the coking-oven are utilized to heat water.

Some of the advantages derived by the use of the improved coking attachment are prevention of wasteful smoke and cinders, cleaner lires, economy of fuel, and greater steaming' capacity of boiler.

The invention may be applied to any furnace, and is particularly adapted for locomotive-furnaces and for use in city plants,

where black smoke and cinders are so objectionable.

In some cases, if desired, the gases from the coking-oven might be wholly or partially collected and used exterior] y to the lire-chamber of the furnace, only the derived coke being' burned therein.

Another advantage of this apparatus is that no cold fuel is deposited directly on the tire, since the coke when dumped thereon will be very hot. lonsequently a much more uniform heat may be maintained in the furnace.

The accompanying' drawings illustrate a simple and efficient form of the Vfuel-cokin, gasproducing', and water-heating attachment.

Figure I is a longitudinal vertical section through the attachment as applied to a boilerfurnace of the locomotive type. Fig. 2 is a transverse vertical section on line Q 2. Fig. l. Fig'. 3 is a detail enlarged side view showing' the water-grate connections, and Fig. et is an enlarged section through one of the watergrate bars and connections.

In said drawings, A represents a boiler-furnace of the locomotive type having' an ash-pit B, tire-chamber f1, crown-sheet D, and lireflues E. Vithin the lire-chamber is located the coking and gas-producing oven F, which is preferably doublewalled and is secured within the upper part of the lire-chamber C in any suitable mannen-as, for example, by means of thimbles f---through which water can pass from the hollow walls of the oven F into the water-space of the boiler, as shown. Between the inner end of the oven Fand rear end of the lire-chamber is a preferably hollow baflle-plate (i, which may be formed by an extension of the rear walls of the oven and communicates with the water-space thereof, as shown. This bathe-plate isadapted to prevent the products of combustion escaping' directly from chamber (l into lines E and compels them to pass up around and through the oven F before they reach the liues E, thus subjecting' the oven and its contents to great heat. A small passage f/ may, however, be left in the lower part of baille-plate (i to allow a more direct draft during initial tiring of the boiler. The oven F is provided with a series of longitudinal liretubes F', extending therethrough from front to rear thereof, through which tubes the hot gases from the lire-chamber pass and impart heat to the fuel TOO in the oven, facilitating the coking thereof. These tubes do not directly communicate with the oven, as itis not desired to allow the fuelgases to escape directly from the oven into the fire-chamber except as hereinafter described.

The bottom of oven F is preferably formed by a water-grate composed of transverselyarranged hollow rocking bars H, supported on hollow trunnions H, that extend through thimbles f and t in the side walls of the oven and boiler, respectively, as shown in Figs. 2 and 4,. and the outer ends of the opposite trunnions H are respectively connected by suitably-packed joints f/ t" with branch pipes I I', pipe-s1 connecting with acommon pipe J, leading to the lower part of the water-space of the boiler, and pipes I connecting' with a common pipe J, leading into the upper part of the water-space of the boiler, by which ar rangement a circulation of water is produced through the hollow grate-bars.

0n the adjoining trunnions H', at one side of the furnace and preferably exterior thereto, are secured intermeshing gears K, by which the grate-bars can be simultaneously rocked, when desired, to dump the coke into the firechamber. An operating-lever/tis fastened to one of said gears and is provided with a handlatch to lock the lever to a segment it, attached to the side of the furnace, as indicated in Fig. 3, and thus hold the grate-bars in any position to which they are adjusted.

The gases generated in the oven may be conducted off through pipes L to any desired point for subsequent utilization. Preferably, however, these pipes conduct the gases directly into the fire-chamber below the oven, as shown in Fig. 2, so that they will be immediately utilized to support and augment combustion in the lire-cham ber, and thus maintain the heat of the coking-oven. If desired, steam may be admitted into the delivery ends of pipes L through pipes Z, controlled by valves Z', the steam injectingthe gases into the fire-chamber and commingling therewith, thus increasing the intensity of combustion in the {ire-chamber. The fuel is introduced into the coking-oven through a passage F2 in the front walls of the furnace and over, closed by a door f2, as indicated in Fig. 1.

Operation: A fire is first kindled on the grate in the fire-chamber, and then a charge of fuel, such as coal, is introduced into the oven F and the latter closed. The heat of the oven gasities the fuel therein to a large degree and ultimately cokes it. The liberated gases are conducted from the oven through pipes L and discharged into the combustionchamber C, where they are consumed, their combustion increasing the heat in the firechamber and also lessening the necessity for maintaining a large quantity of fuel therein. i/Vhen the fuel in the oven is suiciently coked, which the attendant can easily determine by inspection, the grate-bars H are rocked, so as to dump the coke onto the lire in the fire-chamber, where it is utilized to maintain combustion in the fire-chamber, and as the coke is hot it does not materially dampen or lessen the fire in the tire-chamber, and the increased volume of burning fuel in the lire-chamber is suflicient to maintain the temperature at a high point while the cokingoven is replenished with fresh fuel. The fresh fuel placed in the coking-oven is in like manner gasilied and coked and the resultant products utilized in the manner before described. As the fresh fuel is first introduced into the coking-oven and not admitted into the fire-chamber until it is coked, the escape of free carbon in the form of smoke or cinders is prevented, and the objectionable and wasteful smoke produced by ordinary furnaces is avoided.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. rEhe combination with va furnace, of a coking-oven in the fire-chamber thereof, and fire-tubes passing through said oven.

2. The combination with a furnace, of a coking and gas-producing oven in the upper part of the iire-chamber thereof having a dumping grate, fire tubes passing through said oven, and means for conducting off the gases generated in said oven.

3. The combination with a furnace, of a coking-oven arranged in the upper part of the lire-chamber thereof, provided with a dumping-grate composed of hollow rocking bars, means for circulating water through said bars, and means for rocking them, liretubes passing through said oven above the grate, and means for conducting off the gases from the oven.

4. The combination with a furnace, of a coking-oven in the lire-chamber thereof, and a hollow water-holding baflie-plate connected to the oven and adapted to cause the products of combustion to circulate around the oven.

5. The combination of a furnace having a fire-chamber, a coking-oven in the upper part of said chamber provided with fire-tubes, and a baffle-plate below the oven.

6. The combination with a furnace, of a coking and gas-producing oven in the firechamber. thereof, havingI a dumping grate or bottom, lire-tubes extending through said oven and a baffle-plate below the oven arranged to cause the products of combustion in the fire-chamber to circulate around and through the oven.

7. The combination with a boiler-furnace, of a coking and gas-producing oven in the fire chamber thereof, having a dumping water-grate, pipes for conducting gases from the oven into the fire-chamber of the furnace, and a hollow water-holding baffle-plate below the oven and connected therewith and arranged to cause the products of combustion in the IOO IIC

tire-chamber to circulate around and through the oven before passing' to the boiler-tubes.

S. The combination with a boiler-furnace, of a eoking and gas-producing' and waterheating' attachment in the fire-chamber thereof comprising an oven having double waterholtling walls, and a baffle-plate below the oven and in front of the boiler-tubes.

9. The combination with a boiler-furnace, of a colzing and gas-producing and waterheating attachment in the tire-chamber thereof comprising` an oven having double waterholding walls, a series of rocking` hollow gratebars forming' the bottom of the oven, means for Circulatingl water through the grate-bars and between the hollow walls of the oven, and a baffle-plate below the oven and in front of the boiler-tubes.

l0. The combination with a boiler-furnace, of a eoking' and gas-producing oven in the fire-chamber thereof, having double waterholding' walls, water-eireulating, Connections between the hollow walls of the oven and the water-space of the boiler, and a hollow baleplate below the oven and in front of the boilertubes.

1l. The combination with a boiler-furnace, of a ooking, and gas-producing' oven in the lire-chamber thereof, said oven having' double water-holding"walls, a series of rocking' hollow grate-bars forming the bottorn of the oven, and means for rocking said bars to dump the coke from the oven into the fire-chamber; watercirculating' connections between the grate-bars and water-space of the boiler,water circulating connections between the hollow walls of the oven and the water-space of the boiler, and a hollow baffle-plate below the oven and in front of the boiler-tubes.

ln testimony that 1 claim the foregoing as my own I afx my signature in presence of two witnesses.

THOMAS J. TILLER. In presence of- G. B. HUNTER, ANNIE C. PRITCHETT. 

